Using a larval growth index to detect the environment-recruitment relationships and its linkage with basin-scale climate variability: A case study for Japanese anchovy (Engraulis japonicus) in the Yellow Sea
Using a larval growth index to detect the environment-recruitment relationships and its linkage with basin-scale climate variability: A case study for Japanese anchovy (Engraulis japonicus) in the Yellow Sea
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DOI：
10.1016/j.ecolind.2020.107301
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发表时间：
2021-03
影响因子：
6.9
通讯作者：
Qinwang Xing;Haiqing Yu;S. Ito;Shuyang Ma;Huaming Yu;Hui Wang;Yongjun Tian;Peng Sun;Yang Liu
中科院分区：
文献类型：
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作者：
Qinwang Xing;Haiqing Yu;S. Ito;Shuyang Ma;Huaming Yu;Hui Wang;Yongjun Tian;Peng Sun;Yang Liu
越来越多的证据表明，气候变化通过调节小型中上层鱼类的补充量，对许多小型中上层鱼类的种群波动产生重大影响。然而，大多数与补充有关的研究都集中在年度或季节规模的大型产卵/哺育场，而很少有人考虑到脆弱的被动迁移期间短期环境变化的影响。在这项研究中，一个幼虫生长指数的基础上的拉格朗日粒子跟踪模型，再加上一个流体动力学模型，专注于早期的增长和被动运输的SPF的开发，以确定关键的产卵/护理期和理由容纳鱼类招聘。以黄海鳀鱼（Engraulis）为例，确定了鳀鱼的关键产卵场和补充时间，探讨了海温和气候变率对鳀鱼补充的影响。1987-2004年7月，渤海和黄海西南部的补充指数与产卵或仔稚鱼追踪路径沿着的平均生长指数（平均水温）呈显著正（负）相关，表明渤海和黄海西南部是补充成功的关键产卵场和时期。释放颗粒物的多年跟踪路径表明，黄海西南部和渤海中部可能是重要的养育场。同时，7月海温与海盆尺度的海气相互作用有关。由此提出了黄、渤海日本鱼潜在的“大气-海洋-补充”影响模式，即大气变化导致的关键产卵/哺育期的高（低）温可能通过限制鱼幼体的生长和存活而降低（促进）补充成功率。本研究所建立的幼体生长指数可广泛应用于其他沃茨的其他小型中上层鱼类，并为气候诱导的补充研究提供参考。
Increasing evidence has suggested that climate variability has a vital impact on the stock fluctuation of many small pelagic fishes by regulating their recruitment. However, most recruitment-related studies have focused on large spawning/nursing grounds at annual or seasonal scales, while few have considered the impact of short-term environmental variations during the vulnerable passive-transport period. In this study, a larval growth index based on a Lagrangian particle-tracking model coupled with a hydrodynamic model that focused on the early growth and passive transport of the SPF was developed to identify the key spawning/nursing period and grounds accommodating fish recruitment. Taking Japanese anchovy (Engraulis japonicus) in the Yellow Sea as an example, the key spawning grounds and time for its recruitment was identified and the impact of sea-surface temperature (SST) and climate variability on its recruitment was then investigated and discussed. Significant positive (negative) correlations were identified between the recruitment index and the mean growth index (mean water temperature) along the tracking path of eggs or larvae released in the Bohai Sea and the southwestern Yellow Sea during July (1987–2004), implying that these were the key spawning grounds and period for recruitment success. The multi-year tracking path of released particles indicated that both the southwestern Yellow Sea and the central Bohai Sea may be the key nursing grounds. Meanwhile, the SST in July was found to be associated with basin-scale atmosphere–ocean interactions. A potential “atmosphere–ocean-recruitment” influence pattern for Japanese anchovy in the Yellow and Bohai Seas was thus proposed, in which higher (lower) temperature during the key spawning/nursing period induced by atmospheric variation might diminish (promote) recruitment success by limiting the growth and survival of anchovy larvae. The larval growth index developed in this study can be widely applied to other small pelagic fishes in other waters and provide implications for climate-induced recruitment studies.